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diff --git a/src/engine/LearnRequest.hpp b/src/engine/LearnRequest.hpp
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+++ b/src/engine/LearnRequest.hpp
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+/*
+  This file is part of Machina.
+  Copyright 2007-2013 David Robillard <http://drobilla.net>
+
+  Machina is free software: you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation, either version 3 of the License, or any later version.
+
+  Machina is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Machina.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MACHINA_LEARNREQUEST_HPP
+#define MACHINA_LEARNREQUEST_HPP
+
+#include "raul/Maid.hpp"
+
+#include "machina/types.hpp"
+
+#include "MidiAction.hpp"
+#include "Node.hpp"
+
+namespace machina {
+
+class Node;
+class MidiAction;
+
+/** A request to MIDI learn a certain node.
+ */
+class LearnRequest : public Raul::Maid::Disposable
+{
+public:
+	static SPtr<LearnRequest> create(SPtr<Raul::Maid> maid, SPtr<Node> node);
+
+	void start(double q, Raul::TimeStamp time);
+	void finish(TimeStamp time);
+
+	inline bool started() const { return _started; }
+
+	const SPtr<Node>&       node()         { return _node; }
+	const SPtr<MidiAction>& enter_action() { return _enter_action; }
+	const SPtr<MidiAction>& exit_action()  { return _exit_action; }
+
+private:
+	LearnRequest(SPtr<Raul::Maid> maid, SPtr<Node> node);
+
+	bool                  _started;
+	TimeStamp             _start_time;
+	double                _quantization;
+	SPtr<Node>       _node;
+	SPtr<MidiAction> _enter_action;
+	SPtr<MidiAction> _exit_action;
+};
+
+} // namespace machina
+
+#endif // MACHINA_LEARNREQUEST_HPP